Read the following passage and mark the letter A, B, C, or D to indicate the answer to each of the question. Children who experience a rewarding friendship before the birth of a sibling are likely to have a better relationship with that brother or sister that endures throughout their childhood, said Laurie Kramer in a University of Illinois study published in December’s Journal of Family Psychology. ‘When early friendships are successful, young children get the chance to master sophisticated ...

Read the following passage and mark the letter A, B, C, or D to indicate the answer to each of the question.

Children who experience a rewarding friendship before the birth of a sibling are likely to have a better relationship with that brother or sister that endures throughout their childhood, said Laurie Kramer in a University of Illinois study published in December’s Journal of Family Psychology.

‘When early friendships are successful, young children get the chance to master sophisticated social and emotional skills, even more than they do with a parent. When parents relate to a child, they do a lot of the work, figuring out what the child needs and then accommodating those needs, says Kramer. However, this is not usually the case when two children are interacting.

The research showed that the benefits of early friends are long-lasting. Children who had a positive relationship with a best friend before the birth of a sibling ultimately had a good relationship with their sibling that lasted throughout adolescence, Kramer said. And children who as preschoolers were able to coordinate play with a friend, manage conflicts, and keep an interaction positive in tone were most likely as teenagers to avoid the negative sibling interaction that can sometimes launch children on a path of antisocial behavior, she added. ‘From birth, parents can nurture and help develop these social competencies (or skills) by making eye contact with their babies, offering toys and playing with them,' she said.

(Adapted from Vocabulary for IELTS, Pauline Cullen)

The passage is mainly about _______.